i was hesitant at first so my buddy sent me some sippers. once i ran the sippers in one rack i turned around and ordered enough for the rest of my racks and future ones. i ordered ine from http://www.reptilebasics.com/
it should not run you 300 dollars if its just for what you showed in the pic. i made my own bucket adapters with pieces from the hardware store. i didnt save only about a dollar though. easier to just order it with your sippers. i bought my buckets from tractor supply. they are horse feeding buckets and have a flat side and are a little wider and shorter. if you have the head room then regular buckets work fine. 3/16 line can be bought at any hardware store.
i prefer auto watering but i wouldnt suggest it for mice. mice will pack the tips with shavings and flood you out constantly. if the bottles arent that big a deal for you then keep using them some actually prefer them. but auto watering is the only way ill ever keep rats.
adam jeffery